//定义Animal类
class Animal {
    private  String name;
    private int age;
    public String getName(){
        return name;
    }
    public void setName (String name){
        this.name = name;
    }
    public int getAge (){
    return
}
public void setAge(int age){
    this.age=age;
    }
}
//定义Dog类继承Anima类
class Dog extends Animal{
    //此处不写任何代码
}
//定义测试类
public class Example01 {
    public static void main(String[] args) {
        Dog dog = new Dog();
        dog.setName("牧羊犬");
        dog.setAge(3);
        System.out.println("名称："+dog.getName()+",年龄："+dog.getAge());
    }
}